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Title: Shot Peening Of Nitrided Layer
Author: A. Nakonieczny, G. Monka, I. Pokorska
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008059
Number of pages: 6
Abstract:
ABSTRACT
Shot-peening is a method widely used in industrial practice in order to enhance service properties of machine components. Commonly known are such advantages derived from
this dynamic surface cold working, i.e. shot-peening, as: increase of fatigue strength, contact fatigue, resistance to corrosion fatigue and to stress corrosion. The
utilization of shot-peening to the enhancement of nitrided layers is the object of increased interest of researchers. The aim of this project was to determine the effect of
a 2-step nitriding and shot-peening treatment on the mechanical properties of 40HM (AISI4140) grade steel. A new approach to the nitriding process was taken, enabling the
formation of nitrided cases free of the iron nitride layers at the surface. The article contains the results of structural investigations, hardness measurements,
measurements of residual stresses, rotational bending fatigue, as well as contact fatigue.
KEY WORDS
Shot-peening, nitrided layer, residual stresses, pitting, fatigue strength
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